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Finding the Fourth Proportional to 716,237.70, 988,426.71 and 393,956.25

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Solution

The fourth proportional to 716,237.70, 988,426.71 and 393,956.25 is: 543,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,237.70 : 988,426.71 = 393,956.25 : x
  2. Step 2: Convert to fraction form
    716,237.70/988,426.71 = 393,956.25/x
  3. Step 3: Cross multiply
    716,237.70x = 988,426.71 × 393,956.25
  4. Step 4: Simplify right side
    716,237.70x = 389,396,880,071.44
  5. Step 5: Solve for x
    x = 389,396,880,071.44/716,237.70
  6. Step 6: Final answer
    x = 543,669.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.